Paste.
"Okay," Elias whispered. He navigated to the official site and downloaded the trial version. He installed it, hit the scan button, and watched the progress bar zipped across the screen.
He switched back to the MacBooster window. The cursor blinked in the license field.
license keys, though it is generally safer to buy from the developer to ensure the key isn't revoked.
Click the Apple Menu > About This Mac > Storage > Manage to use macOS's built-in cleanup tools.